AIM
10/12/17
4. When parallel approach courses are less than 2500 feet
apart and reduced in-trail spacing is authorized for
simultaneous dependent operations, a chart note will
indicate that simultaneous operations require use of
vertical guidance and that the pilot should maintain last
assigned altitude until established on glide slope. These
approaches procedurally require utilization of the ILS
glide slope for wake turbulence mitigation. Pilots should
not confuse these simultaneous dependent operations with
(SOIA) simultaneous close parallel PRM approaches,
where PRM appears in the approach title.
5. Altitude restrictions depicted at stepdown
fixes within the final approach segment are
applicable only when flying a Non-Precision
Approach to a straight-in or circling line of minima
identified as a MDA(H). Stepdown fix altitude
restrictions within the final approach segment do not
apply to pilots using Precision Approach (ILS) or
Approach with Vertical Guidance (LPV, LNAV/
VNAV) lines of minima identified as a DA(H), since
obstacle clearance on these approaches are based on
the aircraft following the applicable vertical
guidance. Pilots are responsible for adherence to
stepdown fix altitude restrictions when outside the
final approach segment (i.e., initial or intermediate
segment), regardless of which type of procedure the
pilot is flying. (See FIG 5-4-1.)
FIG 5-4-1
Instrument Approach Procedure Stepdown Fixes
5-4-8
Arrival Procedures